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      1 /*	$NetBSD: osiop_sbdio.c,v 1.4 2008/05/14 13:29:28 tsutsui Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2001, 2005 Izumi Tsutsui.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #include <sys/cdefs.h>
     28 __KERNEL_RCSID(0, "$NetBSD: osiop_sbdio.c,v 1.4 2008/05/14 13:29:28 tsutsui Exp $");
     29 
     30 #include <sys/param.h>
     31 #include <sys/systm.h>
     32 #include <sys/device.h>
     33 
     34 #include <machine/bus.h>
     35 #include <machine/sbdiovar.h>
     36 
     37 #include <dev/scsipi/scsi_all.h>
     38 #include <dev/scsipi/scsipi_all.h>
     39 #include <dev/scsipi/scsiconf.h>
     40 
     41 #include <dev/ic/osiopreg.h>
     42 #include <dev/ic/osiopvar.h>
     43 
     44 int osiop_sbdio_match(device_t, cfdata_t, void *);
     45 void osiop_sbdio_attach(device_t, device_t, void *);
     46 int osiop_sbdio_intr(void *);
     47 
     48 CFATTACH_DECL_NEW(osiop_sbdio, sizeof(struct osiop_softc),
     49     osiop_sbdio_match, osiop_sbdio_attach, NULL, NULL);
     50 
     51 int
     52 osiop_sbdio_match(device_t parent, cfdata_t cf, void *aux)
     53 {
     54 	struct sbdio_attach_args *sa = aux;
     55 
     56 	return strcmp(sa->sa_name, "osiop") ? 0 : 1;
     57 }
     58 
     59 void
     60 osiop_sbdio_attach(device_t parent, device_t self, void *aux)
     61 {
     62 	struct osiop_softc *sc = device_private(self);
     63 	struct sbdio_attach_args *sa = aux;
     64 	int error, scid;
     65 
     66 	sc->sc_dev = self;
     67 	sc->sc_dmat = sa->sa_dmat;
     68 	sc->sc_bst  = sa->sa_bust;
     69 
     70 	error = bus_space_map(sc->sc_bst, sa->sa_addr1, OSIOP_NREGS, 0,
     71 	    &sc->sc_reg);
     72 	if (error != 0) {
     73 		aprint_error(": can't map registers, error = %d\n", error);
     74 		return;
     75 	}
     76 
     77 	sc->sc_clock_freq = 25;	/* MHz */
     78 	sc->sc_ctest7 = 0;
     79 	sc->sc_dcntl = OSIOP_DCNTL_EA;
     80 	if (sa->sa_flags == 0x0001) /* TR2A */
     81 		sc->sc_ctest4 = OSIOP_CTEST4_MUX; /* Host bus multiplex mode */
     82 
     83 	scid = ffs(osiop_read_1(sc, OSIOP_SCID));
     84 	if (scid == 0)
     85 		scid = 7;
     86 	else
     87 		scid--;
     88 	sc->sc_id = scid;
     89 
     90 	intr_establish(sa->sa_irq, osiop_sbdio_intr, sc);
     91 
     92 	osiop_attach(sc);
     93 }
     94 
     95 int
     96 osiop_sbdio_intr(void *arg)
     97 {
     98 	struct osiop_softc *sc = arg;
     99 	uint8_t istat;
    100 
    101 	if (sc->sc_flags & OSIOP_INTSOFF)
    102 		return 0;
    103 
    104 	istat = osiop_read_1(sc, OSIOP_ISTAT);
    105 
    106 	if ((istat & (OSIOP_ISTAT_SIP | OSIOP_ISTAT_DIP)) == 0)
    107 		return 0;
    108 
    109 	/* Save interrupt details for the back-end interrupt handler */
    110 	sc->sc_sstat0 = osiop_read_1(sc, OSIOP_SSTAT0);
    111 	sc->sc_istat = istat;
    112 	sc->sc_dstat = osiop_read_1(sc, OSIOP_DSTAT);
    113 
    114 	osiop_intr(sc);
    115 
    116 	return 1;
    117 }
    118